Armin krah



A KRAH LETTER FILE.

(No Model.)

No. 544,231. Patented Aug. 6,1895.

UNITED STATES 1 PATENT FEICE.

ARMIN KRH, OF BERLIN, GERMANY.

LETTER-FILE.

a"EECI'.i. `]IC./.1'l1(v)1\T` forming part of Letters Patent No.544,231, dated August 6, 1895.

Application tiled March 18, 1895.

.To all whom t may concern.-

Beit known that I, ARMIN KRAH, a citizen of the German Empire, residingat Berlin, in the Kingdom of Prussia-,German Empire, have inventedcertain new and useful Improvements in Letter-Files; and I do hereby de-Clare that the following is a full, clear, and eX- act description ofthe invention, which will enable others skilled in the art to which itappertains to make and use the same.

l My invention relates to letter-tiles and the ike.

A letter file constructed according to this invention is distinguishedby great sim plicity.

In the accompanying drawings, Figure l shows the back ot' an improvedletter-tile seen from the interior. Fig. 2 is a section on `the line frof Fig. 1, showing the covers in two positions. Fig. 3 shows to a largerscale parts of Fig. 1 without the wires. Fig.4 is a side view of Fig. 3.Fig. 5 represents an elevation of a modified form, and Fig. 6 is atransverse section through Fig. 5 to a larger scale. l Y

The letter-file consists, substantially, of a wooden back h, to the twosides of which are fastened the covers m m of the file, either by stripsof leather or by other means, so that these covers, as indicated in Fig.2, can be opened and closed like those of a book. To the interior faceoi the wooden back is secured longitudinally a plate g, bent upward alittle in the middle at g', Figs. 3 and 4, where it is provided with two'double channels t' of sheet metal. These channels z' receive two roundiron or steel wires d and e, which are arranged close together inv thelongitudinal' direction of the back. These wires d and e are furnishedat their ends with rectangular bends c c, which are again united to forma rod c c, Fig. 1. Y It will be seen that the wires c c d and c c e,forming a whole, can'be easily turned in the hinge-plate t', in themanner well known, with the wires of the other letter-files. The twoterminal positions ot' these wires are represented in Fig. 2 by full anddotted lines.

Each of the two longitudinal wires o c carries two wires a and b, bentto an are ot' acir- Serial No. 542,235. (No model.)

I cle and made ot' such length thatwhen the tile is closed the ends ofthe wires a and b will reach close to the front of the opposite wire oc. These wires are in front somewhat pointed, so that sheets ot' paperwhich have previously been perforated at the corresponding places may beslid upon the wires, as is customary with letter-files.

In order that in the closed position indicatedin Fig. l and in dottedlines in Fig. 2 the wires a c and b c shall remain in their position, Iprovide spring-plates ss upon the plate g, Fig. 1, which bear againstthe lower part of the bends'c c, thereby holding these parts more orless firmly. For enabling this to take place better still, the plates ss are each furnished with two grooves s s', which are so formed thereinthat the parts c c of the wire will take into those grooves when thewhole device is in the closed position-that is to say, when the papersbetween c c on the wires a b are to be held together.

Fig. 3 shows one of the plates s with the two grooves s' s', andalso thehinge-plate il upon the plate g g', the two wires de being, however,supposed to have been removed in order to show the details better.

Fig. 4 is aside elevation showing the springplate S.

The inode of operation of these parts will be readily understood. l Thepapers provided with four holes corresponding to the four wires va b areslid upon'the latter after the tile hasbeen opened and the wires havebeen bent apart by hand. This having been effected, the tile is closedbysimply moving the two covers toward each other, whereupon the innersides of these covers will move the wires o' c toward themiddle'untilthe parts c c engage with the grooves s s. If it is desiredto take one or more papers from the file, I simply pass the hand betweensuch papers and push them gently asunder until thev parts c c slide fromthe grooves s s and pass to the position indicated in full lines in Fig.2, so that I may now easily remove the papers by slipping them from thewires a b and also put them back again.

Figs. 5 and 6 show a modification.

arrangement no covers are used, th'e'r'e being only a wooden back h.Covers may, however,

if desired, be provided on this back, as at m mv in Fig. l. As thismodified device illustrated in Figs. 5 and 6 is chietlydesigned for useas a newspaper le, such c'overs m m are mostly superliuous.

A further diierence from the arrangement shown in Figs. 1 to 4 consistsin that the wires d e are fixed in the two platess s, and that,moreover, instead of the wires c c use is made of sheet-metal strips C,which are bent to the forni of tubes at their lower ends and also attheir upper ends a b. The four Wires b b" are now all placed on oneside-for instance, on the right-hand side, Fig. 6-and are riveted in thetube D or otherwise fixed. The points of 'these four wires b penetratepartially into four holes a in the tube a on the left-hand side, asclearly indicated in Fig. 6 by dotted lines. The plates s s are providedwith depressions s s in order that the parts c c" may be kept in theclosed position. This arrangement is very convenient if it is desired toclamp a newspaper or but few other sheets between ct and b. In this casethe sheets need not be previously perforated, being held between theopened plates, which are then allowed to close, the points then penetrating through the sheets into the holes a.

The back h may be furnished with a haii dle h', Fig. 5, for enabling thetile to be conveniently held in the hand.

l. In a paper file, the combination with a back, of two sheet retainingclips hinged to said back, and a spring plate secured to said back ateach end of said hinged clips, said spring plates having grooves adaptedto be engaged by said hinged clips and operating to hold said clipsclosed, substantially as described. v

2. In a paper lile, the combination with the back h and the leaves m, m,hinged thereto, of the plate g secured to said back and provided withtwo tubular channels z', wires d, e, seated in said channels andprovided at their opposite ends with lateral extensions c, c, rods c',c', connecting the outerends of said extensions, curved fingers a, l),carried by said rods, and spring plates s, s, secured to said back andprovided with recesses s', s', adapted to be engaged by the extensionsc, c, substantially as described.

In witness whereofI have hereunto set my hand, at Berlin, this 22d dayof January, 1805.

ARMIN KRAII.

Titnessesz J. LEMAN, WM. HAUPT.

